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gluon-radv-filterd: Invalidate originators cache after some time (#1343)

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Jan-Philipp Litza 2018-06-05 21:55:30 +02:00 committed by Andreas Ziegler
parent 603912dd0d
commit e909d45ab0
1 changed files with 23 additions and 0 deletions
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23
package/gluon-radv-filterd/src/gluon-radv-filterd.c
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@ -67,6 +67,10 @@
// Also, the first update will take at least this long
#define MIN_INTERVAL 15
// Remember the originator of a router for at most this period of time (in
// seconds). Re-read it from the transtable afterwards.
#define ORIGINATOR_CACHE_TTL 300
// max execution time of a single ebtables call in nanoseconds
#define EBTABLES_TIMEOUT 500000000 // 500ms
@ -727,6 +731,14 @@ static void update_ebtables(void) {
error_message(0, 0, "warning: adding new rule to ebtables chain %s failed", G.chain);
}
static void invalidate_originators(void)
{
struct router *router;
foreach(router, G.routers) {
memset(&router->originator, 0, sizeof(router->originator));
}
}
static void sighandler(int sig __attribute__((unused)))
{
G.stop_daemon = 1;
@ -737,12 +749,16 @@ int main(int argc, char *argv[]) {
fd_set rfds;
struct timeval tv;
struct timespec next_update;
struct timespec next_invalidation;
struct timespec now;
struct timespec diff;
clock_gettime(CLOCK_MONOTONIC, &next_update);
next_update.tv_sec += MIN_INTERVAL;
clock_gettime(CLOCK_MONOTONIC, &next_invalidation);
next_invalidation.tv_sec += MIN_INTERVAL;
G.sock = -1;
parse_cmdline(argc, argv);
@ -782,6 +798,13 @@ int main(int argc, char *argv[]) {
// all routers could have expired, check again
if (G.routers != NULL) {
if(timespec_diff(&now, &next_invalidation, &diff)) {
invalidate_originators();
next_invalidation = now;
next_invalidation.tv_sec += ORIGINATOR_CACHE_TTL;
}
update_tqs();
update_ebtables();